EP 2246854 A1 20101103 - Optical storage medium comprising tracks with different modulation codes, and respective apparatus for reading of data
Title (en)
Optical storage medium comprising tracks with different modulation codes, and respective apparatus for reading of data
Title (de)
Optisches Speichermedium, das Spuren mit verschiedenen Modulationscodes umfasst, und entsprechende Vorrichtung zum Lesen von Daten
Title (fr)
Support de stockage optique comprenant des codes de modulation différents et appareil correspondant pour la lecture de données
Publication
Application
Priority
EP 09305364 A 20090428
Abstract (en)
The optical storage medium comprises a substrate layer and a data layer disposed on the substrate layer, the data layer having a mark/space data structure being arranged in tracks (T1-T12), wherein marks and spaces of a first track are provided in accordance with a first modulation code (M1) and marks and spaces of a neighboring track are provided in accordance with a second modulation code (M2) being different from the first modulation code. The modulation code of marks and spaces of consecutive neighboring tracks is in particular alternating between the first and the second modulation code. An apparatus for reading data from the optical storage medium comprises a pickup for providing a high frequency signal, a tracking signal and a focus error signal, a tracking regulation and a data processing unit, which decodes the high frequency signal in accordance with the first or the second modulation code, in dependency of a respective track.
IPC 8 full level
G11B 7/007 (2006.01); G11B 7/013 (2006.01)
CPC (source: EP)
G11B 7/00718 (2013.01); G11B 7/0903 (2013.01); G11B 7/24 (2013.01)
Citation (search report)
- [XY] WO 2008046777 A1 20080424 - THOMSON LICENSING [FR], et al
- [XY] EP 1372143 A2 20031217 - KONINKL PHILIPS ELECTRONICS NV [NL]
- [YA] EP 2009626 A1 20081231 - DEUTSCHE THOMSON OHG [DE]
- [XY] EP 1968048 A1 20080910 - DEUTSCHE THOMSON OHG [DE]
- [X] US 2007008840 A1 20070111 - MARTENS HUBERT F C [NL], et al
- [A] EP 2040255 A2 20090325 - HITACHI LTD [JP]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
DOCDB simple family (application)
EP 09305364 A 20090428